Centrifugal blower, air conditioning device, and vehicle

Abstract

A centrifugal air blower, an air conditioning device and a vehicle, the centrifugal air blower comprising an impeller, a casing and a guide vane, the casing being sleeved on the impeller, a first air flow path, a second air flow path and a third air flow path being sequentially arranged along the axial direction of the impeller between the inner circumferential wall of the casing and the outer circumferential wall of the impeller; the guide vane is movably arranged in the casing, when the guide vane is in a first movement position, the first air flow path and the second air flow path are both communicated with a first air outlet; when the guide vane is in a second movement position, the second air flow path and the third air flow path are both communicated with a second air outlet. The centrifugal air blower provided in the application can make the first air outlet flow out the air with high purity entering from the first air inlet, or the second air outlet flow out the air with high purity entering from the second air inlet, so as to improve the defogging effect on the front window of the vehicle and improve the foot blowing temperature.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, specifically to a centrifugal blower, an air conditioning unit, and a vehicle. Background Technology

[0002] Centrifugal fans used in vehicle air conditioning systems have an impeller driven by a motor to blow air out, and a vortex body directing the air blown out from the impeller toward the airflow path. Additionally, centrifugal fans suitable for dual-flow vehicle air conditioning systems are known. These fans can draw in outside air into one airflow path and deliver it, while simultaneously drawing in interior air into the other airflow path and delivering it. This allows outside air to be blown towards the windshield to prevent fogging, and the intake of pre-heated interior air for circulation to improve heating efficiency.

[0003] For such a dual-flow centrifugal blower, the external air and the air inside the vehicle are easily mixed in the airflow path, which reduces the effectiveness of preventing fogging on the windshield or greatly reduces the efficiency of raising the foot temperature. Summary of the Invention

[0004] The purpose of this application is to provide a centrifugal blower, an air conditioning unit, and a vehicle that solves the problems of mixing external air with interior air, reducing the effectiveness of preventing fogging on the windshield, and significantly reducing the efficiency of raising foot temperature.

[0005] To achieve the objectives of this application, the following technical solution is provided:

[0006] In a first aspect, this application provides a centrifugal blower, comprising:

[0007] impeller;

[0008] A housing is fitted onto the impeller. The housing includes a first air inlet, a second air inlet, a first air outlet, and a second air outlet. A first air flow path, a second air flow path, and a third air flow path are formed between the inner peripheral wall of the housing and the outer peripheral wall of the impeller, arranged sequentially along the axial direction of the impeller. The first air flow path, the first air inlet, and the first air outlet are connected. The first end of the second air flow path is connected to the first air inlet and the second air inlet. The second end of the second air flow path is connected to the first air outlet or the second air outlet. The third air flow path, the second air inlet, and the second air outlet are connected.

[0009] An air guide is movably disposed within the housing. The air guide has a first moving position and a second moving position. When the air guide is in the first moving position, both the first air flow path and the second air flow path are connected to the first air outlet. When the air guide is in the second moving position, both the second air flow path and the third air flow path are connected to the second air outlet.

[0010] In one embodiment, the housing includes an inner peripheral wall, a first partition wall, and a second partition wall. The first partition wall and the second partition wall are spaced apart and protrude from the inner peripheral wall along the axial direction of the impeller. The first partition wall is arranged around the circumference of the impeller, and the second partition wall is arranged around the circumference of the impeller.

[0011] The first partition wall and the second partition wall divide the inner cavity of the housing into the first air flow path, the second air flow path and the third air flow path.

[0012] In one embodiment, the first end of the air guide is connected to the housing, and the air guide is rotatable relative to the housing. When the air guide is in the first moving position, the second end of the air guide is flush with the second partition wall, so that the air in the first air flow path and the second air flow path is discharged from the first air outlet.

[0013] When the air guide is in the second moving position, the second end of the air guide is flush with the first partition wall, so that the air in the second air flow path and the third air flow path is discharged from the second air outlet.

[0014] In one embodiment, the centrifugal blower further includes a separator cylinder, which is inserted into the impeller and located between the impeller and the first air inlet or the second air inlet. A fourth air flow path is formed between the outer peripheral wall of the separator cylinder and the inner peripheral wall of the impeller, and a fifth air flow path is formed between the inner peripheral wall of the separator cylinder. The first air inlet is connected to the fourth air flow path, and the second air inlet is connected to the fifth air flow path.

[0015] The fourth airflow path is connected to the first airflow path and the second airflow path, and the fifth airflow path is connected to the second airflow path and the third airflow path.

[0016] In one embodiment, the separator has an outlet end located between the first partition wall and the second partition wall, and the inner diameter of the outlet end gradually increases along the axial direction of the impeller from the end closer to the first air inlet to the end farther away from the air inlet.

[0017] The outlet end is used to guide the air in the fourth airflow path to the first airflow path and the second airflow path, and to guide the air in the fifth airflow path to the second airflow path and the third airflow path.

[0018] In one embodiment, the centrifugal blower further includes a first driving component, which includes a rotating shaft and a driving body for driving the rotating shaft to rotate. The driving body is disposed on the outer wall of the housing, one end of the rotating shaft passes through the housing, and the axis of the rotating shaft is parallel to the axis of the impeller.

[0019] One end of the air guide is fixed to the rotating shaft, and the air guide extends radially along the rotating shaft from the end near the rotating shaft to the end near the impeller.

[0020] In one embodiment, the rotating shaft is located between the first partition wall and the second partition wall, and the rotating shaft separates the first air outlet and the second air outlet.

[0021] In one embodiment, the centrifugal blower further includes a second drive member that drives the impeller to rotate about its axis to blow air entering the impeller from the first air inlet and the second air inlet in a centrifugal direction.

[0022] The first air inlet and the second air inlet are located at one end of the impeller axis, and the second drive member is located at the other end of the impeller axis; the first air inlet and the second air inlet both extend along the impeller axis, and the first air outlet and the second air outlet both extend along the tangential direction of the impeller.

[0023] In one embodiment, the housing includes a first housing and a second housing that are separately disposed along the axial direction of the impeller, the first air inlet and the second air inlet are disposed on the first housing, and the impeller and the second drive member are disposed on the second housing;

[0024] One of the first housing and the second housing is provided with a buckle, and the other housing is provided with a slot, and the buckle engages with the slot.

[0025] In one embodiment, the centrifugal blower further includes a filter screen disposed inside the first housing and located between the first air inlet or the second air inlet and the separation cylinder.

[0026] Secondly, this application also provides an air conditioning device, including the centrifugal fan described above.

[0027] Thirdly, this application also provides a vehicle including the air conditioning unit described above.

[0028] The centrifugal blower, air conditioning device, and vehicle provided in this application embodiment have a first air flow path, a second air flow path, and a third air flow path sequentially arranged between the inner peripheral wall of the housing and the outer peripheral wall of the impeller. The air in the second air flow path is a mixed gas that enters from the first air inlet and the second air inlet. Through the movable air guide, the position of the air guide can be adjusted according to the mode of the air conditioning device, thereby controlling the first air flow path and the second air flow path to connect with the first air outlet, or controlling the second air flow path and the third air flow path to connect with the second air outlet. This allows the first air outlet to discharge air with higher purity that enters from the first air inlet, or the second air outlet to discharge air with higher purity that enters from the second air inlet. This improves both the defogging effect on the vehicle's windshield and the temperature of the footwell. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0030] Figure 1 This is a perspective view of a centrifugal blower according to one embodiment of this application;

[0031] Figure 2 This is an exploded view of a centrifugal blower according to one embodiment of this application;

[0032] Figure 3 This is a cross-sectional view of a centrifugal blower according to one embodiment of this application;

[0033] Figure 4 This is a schematic diagram of the internal structure of a centrifugal blower according to one embodiment of this application;

[0034] Figure 5 This is a partial structural schematic diagram of a centrifugal blower according to one embodiment of this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 100 Impeller; 200 Housing; 211 First air inlet; 212 Second air inlet; 221 First air outlet; 222 Second air outlet; 231 First air flow path; 232 Second air flow path; 233 Third air flow path; 234 Fourth air flow path; 241 Inner peripheral wall; 242 First partition wall; 243 Second partition wall; 250 First housing; 251 Buckle; 260 Second housing; 261 Slot; 300 Air guide; 400 Separator cylinder; 410 Fifth air flow path; 420 Outlet side end; 500 First drive component; 510 Rotating shaft; 520 Drive body; 600 Second drive component; 700 Filter screen. Detailed Implementation

[0037] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] It should be noted that when a component is said to be "fixed" to another component, it can be directly on the other component or it can be in a middle component. When a component is said to be "connected" to another component, it can be directly connected to the other component or it may be in a middle component.

[0039] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains. The terminology used in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. The term "and / or" as used in this application includes any and all combinations of one or more of the associated listed items.

[0040] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0041] Vehicles are an important means of transportation for people's daily travel. In winter, due to the temperature difference between the air inside and outside the vehicle, water vapor will form on the inside side of the windshield. At this time, the air conditioning system is needed to defog. The vehicle air conditioning system has multiple air outlet modes, such as face blowing mode, face blowing and foot blowing mode, foot blowing mode, foot blowing and defrosting mode, and defrosting mode.

[0042] Centrifugal fans for vehicle air conditioning systems are known to draw in and deliver either outside air (air from outside the vehicle) or air from inside the vehicle. Such centrifugal fans have an impeller driven by a motor to blow air out, and the air blown out from the impeller is directed towards a vortex in the airflow path. Additionally, centrifugal fans suitable for dual-flow vehicle air conditioning systems are known, having upper and lower airflow paths, and are so-called dual-flow centrifugal fans. This centrifugal fan can draw in and deliver outside air in one airflow path while simultaneously drawing in and delivering air from inside the vehicle in the other airflow path. Furthermore, during heating, drawing in low-humidity outside air in one airflow path and blowing it towards the windshield prevents fogging, while drawing in heated air from inside the vehicle in the other airflow path and circulating it improves heating efficiency.

[0043] For this type of dual-flow centrifugal fan, problems have been pointed out due to the mixing of outside air flowing in one airflow path and interior air flowing in the other. In particular, if the airflow path carrying low-humidity outside air flows into the airflow path carrying high-humidity interior air, the effect of preventing fogging on the windshield will be reduced; or if the airflow path carrying high-temperature interior air flows into the airflow path carrying low-temperature outside air, the efficiency of raising the footwell temperature will be greatly reduced.

[0044] refer to Figure 1 , Figure 2 and Figure 3 This application provides a centrifugal blower, including an impeller 100, a housing 200, and an air guide 300. The housing 200 is sleeved on the impeller 100, and the impeller 100 is rotatably disposed in the inner cavity of the housing 200. The housing 200 includes a first air inlet 211, a second air inlet 212, a first air outlet 221, and a second air outlet 222. A first air flow path 231, a second air flow path 232, and a third air flow path 233 are formed between the inner peripheral wall 241 of the housing 200 and the outer peripheral wall of the impeller 100, arranged sequentially along the axial direction of the impeller 100. The first air flow path 231, the first air inlet 211, and the first air outlet 221 are connected, and the second air flow path 232 is connected to the first air inlet 211. The first end of the second airflow path 232 is connected to the first air inlet 211 and the second air inlet 212. The second end of the second airflow path 232 is connected to the first air outlet 221 or the second air outlet 222. The third airflow path 233 is connected to the second air inlet 212 and the second air outlet 222. The air guide 300 is movably disposed in the housing 200. The air guide 300 has a first moving position and a second moving position. When the air guide 300 is in the first moving position, the first airflow path 231 and the second airflow path 232 are both connected to the first air outlet 221. When the air guide 300 is in the second moving position, the second airflow path 232 and the third airflow path 233 are both connected to the second air outlet 222.

[0045] Specifically, when the centrifugal fan of this application is used in winter, the outdoor temperature is low, and the temperature of the externally circulated air is also low, resulting in good air quality. The internally circulated air is the air circulating inside the vehicle, which has higher temperature and humidity, resulting in poor air quality. By using dry, fresh externally circulated air (good air quality) for defrosting and blowing on the face, and using air with higher temperature and humidity (poor air quality) to blow on the feet, the defrosting effect of the car windows is improved, and the heating experience for the driver and passengers is enhanced. At the same time, it is also beneficial for heating the feet. By setting a first air inlet 211 and a second air inlet 212, the first air inlet 211 can draw in low-temperature external air, and the second air inlet 212 can draw in high-temperature interior air. Driven by the impeller 100, the external and internal air are drawn into the radial direction of the impeller 100 and blown out in a centrifugal direction, entering between the outer peripheral wall of the impeller 100 and the inner peripheral wall 241 of the housing 200. Because a first airflow path 231, a second airflow path 232, and a third airflow path are formed between the outer peripheral wall of the impeller 100 and the inner peripheral wall 241 of the housing 200, a third airflow path is formed between them. Airflow path 233: External air drawn in from the first air inlet 211 enters the first airflow path 231 and the second airflow path 232 under the drive of the impeller 100. Internal air drawn in from the second air inlet 212 enters the second airflow path 232 and the third airflow path 233 under the drive of the impeller 100. As a result, the air in the second airflow path 232 is a mixture of external and internal air, the air in the first airflow path 231 is external air with higher purity, and the air in the third airflow path 233 is internal air with higher purity. The air guide 300, through its movable configuration, can adjust its position according to the air conditioning system's mode, thereby controlling the mixing of air in the first airflow path 231 and the second airflow path 232, or the mixing of air in the second airflow path 232 and the third airflow path 233. This results in the first air outlet 221 discharging higher-purity external air entering from the first air inlet 211, or the second air outlet 222 discharging higher-purity interior air entering from the second air inlet 212. This improves both the defogging effect on the vehicle's windshield and the temperature of the air blowing on the feet. It should be noted that the first air inlet 211 can also be used to draw in warmer interior air, and the second air inlet 212 can also be used to draw in cooler external air.

[0046] The housing 200 includes an inner peripheral wall 241, a first partition wall 242, and a second partition wall 243. The first partition wall 242 and the second partition wall 243 are spaced apart on the inner peripheral wall 241 along the axial direction of the impeller 100. The first partition wall 242 is arranged around the circumference of the impeller 100, and the second partition wall 243 is arranged around the circumference of the impeller 100. The first partition wall 242 and the second partition wall 243 divide the inner cavity of the housing 200 into a first air flow path 231, a second air flow path 232, and a third air flow path 233. The inner peripheral wall 241 of this application is the inner wall of the housing 200 arranged circumferentially around the impeller 100. The first partition wall 242 and the second partition wall 243 are integrally formed with the inner peripheral wall 241 of the housing 200, which facilitates manufacturing and improves the sealing between the first partition wall 242 and the inner peripheral wall 241, and between the second partition wall 243 and the inner peripheral wall 241, so that the first air flow path 231 is isolated from the second air flow path 232, and the second air flow path 232 is isolated from the third air flow path 233.

[0047] refer to Figure 2 and Figure 3 The centrifugal blower housing 200 of this application includes a first housing 250 and a second housing 260 separately arranged along the axial direction of the impeller 100. A first air inlet 211 and a second air inlet 212 are provided on the first housing 250, and the impeller 100 and the second drive component 600 are provided on the second housing 260. The separate arrangement of the first housing 250 and the second housing 260 reduces the overall manufacturing difficulty of the housing 200 and facilitates the installation of internal components of the housing 200 such as the impeller 100 and the second drive component 600. One of the first housing 250 and the second housing 260 is provided with a buckle 251, and the other is provided with a slot 261. The buckle 251 and the slot 261 are engaged. The first housing 250 and the second housing 260 are connected by the engaging structure to facilitate the overall assembly of the housing 200. The centrifugal blower also includes a filter screen 700, which is disposed inside the first housing 250 and located between the first air inlet 211 or the second air inlet 212 and the separator 400. The filter screen 700 is configured to filter the air entering from the first air inlet 211 and the second air inlet 212, so as to purify the air discharged from the housing 200 and reduce the air humidity and the dust concentration in the air.

[0048] When the impeller 100 rotates, it drives the air inside the housing 200 into the first airflow path 231, the second airflow path 232, and the third airflow path 233, respectively. The first end of the air guide 300 is connected to the housing 200. The air guide 300 can rotate relative to the housing 200, that is, the air guide 300 swings with its first end as the center. When the air guide 300 is in the first moving position, the second end of the air guide 300 is flush with the second partition wall 243, and the air in the first airflow path 231 and the second airflow path 232 is discharged from the first air outlet 221. When the air guide 300 is in the second moving position, the second end of the air guide 300 is flush with the first partition wall 242, and the air in the second airflow path 232 and the third airflow path 233 is discharged from the second air outlet 222. Specifically, when one end of the air guide 300 is flush with the second partition wall 243, the air in the second airflow path 232 mixes with the air in the first airflow path 231 along the air guide 300, so that the air discharged from the first air outlet 221 is a mixture of the first airflow path 231 and the second airflow path 232. At this time, the air discharged from the second air outlet 222 is entirely air from the third airflow path 233; when one end of the air guide 300 is flush with the first partition wall 243, the air in the second airflow path 232 mixes with the air in the first airflow path 231 and the second airflow path 232. When the air is aligned with the first air outlet 222, the air in the second air flow path 232 will mix with the air in the third air flow path 233 along the air guide 300, so that the air discharged from the second air outlet 222 is a mixture of the second air flow path 232 and the third air flow path 233. At this time, the air discharged from the first air outlet 221 is all the air in the first air flow path 231, thereby improving the purity of the air discharged from the first air outlet 221 or improving the purity of the air discharged from the second air outlet 222.

[0049] The centrifugal blower of this application operates as follows: When one end of the air guide 300 is flush with the second partition wall 243, all the air in the first air flow path 231 and the second air flow path 232 is discharged from the first air outlet 221, increasing the air volume of the first air outlet 221. The air discharged from the second air outlet 222 is high-purity recirculated air from the vehicle interior, for example, the proportion of recirculated air is greater than 80%, in order to increase the foot temperature. At this time, when the humidity of the external air entering the housing 200 from the first air inlet 211 is low, for example, the relative humidity is less than 50%, the external air can be directly used for defrosting the windows, which is suitable for the defrosting mode or foot defrosting mode of the air conditioning unit. When the humidity of the external air entering the housing 200 from the first air inlet 211 is slightly high, for example, the relative humidity is greater than 50%, the external air cannot be directly used for defrosting, which is suitable for the face blowing mode or face blowing and foot blowing mode of the air conditioning unit. When one end of the air guide 300 is flush with the first partition wall 242, all the air in the second air flow path 232 is discharged from the second air outlet 222, the air volume of the second air outlet 222 increases, and the air discharged from the first air outlet 221 is high-purity external circulation air, for example, the proportion of external circulation air is greater than 80%, so as to improve the defrosting effect; at this time, when the humidity of the vehicle interior air entering the housing 200 from the second air inlet 212 is high, for example, the relative humidity is greater than 50%, it is suitable for the foot defrosting mode or foot blowing mode of the air conditioning device.

[0050] refer to Figure 3 and Figure 4 The centrifugal blower of this application also includes a separator 400, which is inserted into the impeller 100 and disposed inside the casing 200. The separator 400 is located between the impeller 100 and the first air inlet 211 or the second air inlet 212. The outer peripheral wall of the separator 400 and the inner peripheral wall 241 of the impeller 100 form a fourth air flow path 234, and the inner peripheral wall 241 of the separator 400 forms a fifth air flow path 410. The first air inlet 211 is connected to the fourth air flow path 234, and the second air inlet 212 is connected to the fifth air flow path 410. The fourth air flow path 234 is connected to the first air flow path 231 and the second air flow path 232, and the fifth air flow path 410 is connected to the second air flow path 232 and the third air flow path 233. That is, the air entering from the first air inlet 211 and the second air inlet 212 is separated by the separator 400 and enters the impeller 100 along the outer peripheral wall and the inner peripheral wall 241 of the separator 400 respectively, thereby realizing the separation of the external air drawn in from the first air inlet 211 and the internal air drawn in from the second air inlet 212.

[0051] Specifically, the separator 400 has an outlet end 420 located between the first partition wall 242 and the second partition wall 243. The inner diameter of the outlet end 420 gradually increases along the axial direction of the impeller 100 from the end near the first air inlet 211 to the end away from the air inlet. The outlet end 420 is used to guide the air in the fourth air flow path 234 to the first air flow path 231 and the second air flow path 232, and to guide the air in the fifth air flow path 410 to the second air flow path 232 and the third air flow path 233. The outlet end 420, with its gradually increasing inner diameter, guides the external air drawn in from the first air inlet 211 and the internal air drawn in from the second air inlet 212. This directs most of the external air into the upper half of the impeller 100's axial direction and most of the internal air into the lower half. Since the first airflow path 231, the second airflow path 232, and the third airflow path 233 are sequentially arranged along the impeller 100's axial direction, most of the external air enters the first airflow path 231, and most of the internal air enters the third airflow path 233. The air in the second airflow path 232, located in the middle of the impeller 100's axial direction, is a mixture of external and internal air. Optionally, a baffle is provided circumferentially in the middle of the impeller 100 to divide it axially into upper and lower parts, further separating the external and internal air entering the impeller 100.

[0052] refer to Figure 1 , Figure 2 and Figure 5The centrifugal blower of this application also includes a first driving component 500. The first driving component 500 can be a motor or the like, and there are no specific limitations. The first driving component 500 includes a rotating shaft 510 and a driving body 520 for driving the rotating shaft 510 to rotate. The driving body 520 is disposed on the outer wall of the housing 200. One end of the rotating shaft 510 passes through the housing 200, and the axis of the rotating shaft 510 is parallel to the axis of the impeller 100. One end of the air guide 300 is fixed on the rotating shaft 510, and the air guide 300 extends radially from the end near the rotating shaft 510 to the end near the impeller 100 along the rotating shaft 510. The drive body 520 is located at the end of the air guide 300 away from the first partition wall 242 or the second partition wall 243. The rotating shaft 510 separates the first air outlet 221 and the second air outlet 222. That is, the rotating shaft 510 is located at the boundary between the first air outlet 221 and the second air outlet 222, so that when the drive body 520 drives the air guide 300 to swing, the air in the second air flow path 232 can be discharged from the first air outlet 221 or the second air outlet 222. The axis of the rotating shaft 510 is parallel to the axis of the impeller 100. The rotating shaft 510 is located between the first partition wall 242 and the second partition wall 243. When the rotating shaft 510 drives the air guide 300 to swing, the end of the air guide 300 away from the rotating shaft 510 can be flush with the first partition wall 242 and the second partition wall 243 respectively, and the distance between the air guide 300 and the first partition wall 242 and the second partition wall 243 is reduced, so that the air flowing out of the second air flow path 232 can be effectively separated from the air flowing out of the first air flow path 231 or the air flowing out of the third air flow path 233.

[0053] refer to Figure 1 , Figure 2 and Figure 3 The centrifugal blower of this application also includes a second drive member 600, which drives the impeller 100 to rotate around its axis to blow air entering the impeller 100 from the first air inlet 211 and the second air inlet 212 in a centrifugal direction; the first air inlet 211 and the second air inlet 212 are located at one end of the axial direction of the impeller 100, and the second drive member 600 is located at the other end of the axial direction of the impeller 100; the first air inlet 211 and the second air inlet 212 both extend along the axial direction of the impeller 100, and the first air outlet 221 and the second air outlet 222 both extend along the tangential direction of the impeller 100. Specifically, the second drive component 600 is disposed in the housing 200. The second drive component 600 can be a motor or the like. The impeller 100 is sleeved on the output shaft of the second drive component 600. The first air inlet 211 and the second air inlet 212 extend from the end of the impeller 100 away from the second drive component 600 to the end closer to the second drive component 600. The first air outlet 221 and the second air outlet 222 extend along the tangential direction of the impeller 100 so that air can be blown out in the centrifugal direction under the drive of the impeller 100.

[0054] When the second drive unit 600 drives the impeller 100 to rotate, it can draw air into the interior of the impeller 100 from the first air inlet 211 and the second air inlet 212 located at one end of the impeller 100 along the axial direction. Under the action of the impeller 100, the air is blown out in the centrifugal direction and then discharged from the first air outlet 221 and the second air outlet 222 along the first air flow path 231, the second air flow path 232 and the third air flow path 233. The air guide 300 can also be connected to the second drive unit 600 via a linkage mechanism, thereby eliminating the need for the first drive unit 500, simplifying the overall structure of the centrifugal blower and reducing costs.

[0055] In the description of the embodiments of this application, it should be noted that the orientation or positional relationship of the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and other indicators are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0056] The above-disclosed embodiments are merely preferred embodiments of this application and should not be construed as limiting the scope of this application. Those skilled in the art will understand that all or part of the processes for implementing the above embodiments and equivalent variations made in accordance with the claims of this application are still within the scope of this application.

Claims

1. A centrifugal blower, characterized in that, include: impeller; A housing is fitted onto the impeller. The housing includes a first air inlet, a second air inlet, a first air outlet, and a second air outlet. A first air flow path, a second air flow path, and a third air flow path are formed between the inner peripheral wall of the housing and the outer peripheral wall of the impeller, arranged sequentially along the axial direction of the impeller. The first air flow path, the first air inlet, and the first air outlet are connected. The first end of the second air flow path is connected to the first air inlet and the second air inlet. The second end of the second air flow path is connected to the first air outlet or the second air outlet. The third air flow path, the second air inlet, and the second air outlet are connected. An air guide is movably disposed within the housing. The air guide has a first moving position and a second moving position. When the air guide is in the first moving position, both the first air flow path and the second air flow path are connected to the first air outlet. When the air guide is in the second moving position, both the second air flow path and the third air flow path are connected to the second air outlet.

2. The centrifugal blower according to claim 1, characterized in that, The housing includes an inner peripheral wall, a first partition wall, and a second partition wall. The first partition wall and the second partition wall are spaced apart and protrude from the inner peripheral wall along the axial direction of the impeller. The first partition wall is arranged around the circumference of the impeller, and the second partition wall is arranged around the circumference of the impeller. The first partition wall and the second partition wall divide the inner cavity of the housing into the first air flow path, the second air flow path and the third air flow path.

3. The centrifugal blower according to claim 2, characterized in that, The first end of the air guide is connected to the housing, and the air guide can rotate relative to the housing. When the air guide is in the first moving position, the second end of the air guide is flush with the second partition wall, so that the air in the first air flow path and the second air flow path is discharged from the first air outlet. When the air guide is in the second moving position, the second end of the air guide is flush with the first partition wall, so that the air in the second air flow path and the third air flow path is discharged from the second air outlet.

4. The centrifugal blower according to claim 2, characterized in that, The centrifugal blower also includes a separator cylinder, which is inserted into the impeller and located between the impeller and the first air inlet or the second air inlet. A fourth air flow path is formed between the outer peripheral wall of the separator cylinder and the inner peripheral wall of the impeller, and a fifth air flow path is formed between the inner peripheral wall of the separator cylinder. The first air inlet is connected to the fourth air flow path, and the second air inlet is connected to the fifth air flow path. The fourth airflow path is connected to the first airflow path and the second airflow path, and the fifth airflow path is connected to the second airflow path and the third airflow path.

5. The centrifugal blower according to claim 4, characterized in that, The separator has an outlet end located between the first partition wall and the second partition wall. The inner diameter of the outlet end gradually increases along the axial direction of the impeller from the end closer to the first air inlet to the end farther away from the air inlet. The outlet end is used to guide the air in the fourth airflow path to the first airflow path and the second airflow path, and to guide the air in the fifth airflow path to the second airflow path and the third airflow path.

6. The centrifugal blower according to claim 5, characterized in that, The centrifugal blower further includes a first driving component, which includes a rotating shaft and a driving body for driving the rotating shaft to rotate. The driving body is disposed on the outer wall of the housing. One end of the rotating shaft passes through the housing, and the axis of the rotating shaft is parallel to the axis of the impeller. One end of the air guide is fixed to the rotating shaft, and the air guide extends radially along the rotating shaft from the end near the rotating shaft to the end near the impeller.

7. The centrifugal blower according to claim 6, characterized in that, The rotating shaft is located between the first partition wall and the second partition wall, and the rotating shaft separates the first air outlet and the second air outlet.

8. The centrifugal blower according to claim 4, characterized in that, The centrifugal blower also includes a second driving component, which drives the impeller to rotate around its axis to blow the air entering the impeller from the first air inlet and the second air inlet in a centrifugal direction. The first air inlet and the second air inlet are located at one end of the impeller axis, and the second drive member is located at the other end of the impeller axis; the first air inlet and the second air inlet both extend along the impeller axis, and the first air outlet and the second air outlet both extend along the tangential direction of the impeller.

9. The centrifugal blower according to claim 8, characterized in that, The housing includes a first housing and a second housing that are separately disposed along the axial direction of the impeller. The first air inlet and the second air inlet are disposed on the first housing, and the impeller and the second drive component are disposed on the second housing. One of the first housing and the second housing is provided with a buckle, and the other housing is provided with a slot, and the buckle engages with the slot.

10. The centrifugal blower according to claim 9, characterized in that, The centrifugal blower also includes a filter screen, which is disposed inside the first housing and located between the first air inlet or the second air inlet and the separation cylinder.

11. An air conditioning device, characterized in that, Including the centrifugal blower as described in any one of claims 1-10.

12. A vehicle, characterized in that, Includes the air conditioning unit as described in claim 11.

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